Gas producer



Sept. 26, 1933.

P. VAN ACKEREN GAS PRODUCER Filed March 30, 1931 Patented Sept. 26, 1933s'ra'rss r Paul van Ackeren, Essen, Germany, assignor, by

mesne assignments, to The Koppers Company of Delaware, Pittsburgh, Pa, acorporation of Delaware Application March 30, 1931, Serial No. 526,182,and in Germany May 15, 1930 Claims. (Cl. l866) .My invention relates togas producers and more particularly toproducers having rotary grates.

It is an object ofmy invention to improve a producer of this type withaview to preventing one-sided accumulation of slag in the producer whichmay cause a breaking through the fire, thereby reducing not only the.efficiency of the producer but also, in producers havingwater jackets,interfering withthe heating of the water in the jacket.

To this end I combine with a polygonal rotary grate breaking members orjaws on the shell of the producer. I f I Preferably the members or jawsare distributed uniformly, and preferably the grate is arrangedeccentrically to the producer axis.

The handling of one sided slag accumulations is extremely troublesome.The producer'must be shut down and the slag removed from the ash tray byhand. Lumps of slag which are thicker than the clearance between thelower end of the generator shell and thebottom of. the ash tray andstick in the generator must be brokenup by hand. I 1

Accumulation of slag is principally due to two causes: Firstly toclogging by unduly .large'lumps of slag, and secondly the usualunsuitable shape of the discharge chute which normallyoccupies theentire width of the ash tray intermediate the lower end of the producershell and the sides of the tray.

It is another object of my invention to provide a discharge tube whichwill-not give trouble. To this end I cut away the edge of. the chutewhich faces the producer shell so that it will not interfere with thesloping of the slag discharged from the shell and large lumps will notget jammed betweenthe chute and the sloping slag. It has already beensuggested to shorten the chute vertically but this does not prevent slagaccumulation.

A producer according. to my invention is equipped with a rotary gratewhich has alternately projecting and receding portions and may bearranged concentrically or eccentricallyto the producer shell Breakingmembers are arranged onthe inner wall of the shell for cooperation withthe grate. The size of the grate in relation to the inside diameter ofthe shell is so determined that the smallest clearance between theprojections, or, if desired, the receding portions of the grate, and theshell is smaller than the clearance between the lower end of the shellin the bottom of the ash tray, so that the lumps which are so small asto pass through the smallest clearance in the producenwill movewithoutdifficulty through the clearance at the ash tray.

In the drawing affixed to this specification and forming part thereofthe base portion of a producer designed in accordance with my inventionis illustrated diagrammatically by Way of example. r In the drawing:

Fig. 1 is an axial section of the producer and Fig. 2 is a section onthe line II-II in Fig. 1. A Referring to the drawing, 1 is a polygonalhollow grate, which in the example illustrated'is 7 arrangedeccentrically to the'axis of the producer shell 2. As best seen in Fig.2, the grate is polygonal, with projecting corners 3 and recedingportions 4 intermediate the corners. The bays between the corners at thetop of the grate are equipped with tuyres 5 arranged in stepped rela- 6is an ash tray.

tion on the slopes of the bays. having a horizontal bottom on which thegrate 1 is mounted, above an orifice 20, and an inclined side wall '7.The lower end of the producer shell 2 projects into the ash tray, withits edge pitched above the bottom of the ash tray at the distancespecified above. 8 is a worm wheel which surrounds the bottom of the ashtray, and 91s a worm which imparts rotation to the whe 8, the ash trayand the grate 1.

10 is a circular track projecting downwardly from the bottom plate ofthe ash tray and 11 and 12 are vertical and horizontal rollersinsuitable bearing blocks 13 on the foundation 14 of the producer. Thetrack 10 and its vertical and horizontal roller be'aringstare arrangedin concentric.

relation to the axis of the producer shell 2, while the grate 1, asmentioned above, is arranged 'eccentrically to this axis of theproducershell and to the axis of the roller bearings. 15 are breaking members onthe inner face of the shell:2 opposite the grate 1.

16 is a passage in the foundation 14 through which air is supplied tothe. space within the grate 1, 17 being a vertical pipe connected to thepassage 16, 18 being a water tank surrounding the pipe, and 19 being anannular partition which is secured to the bottomof the ash tray '7around the orifice 20 and dips into the tank 18. The means for admixingsteam to the air are not illustrated. The mixture of air and steam isadmitted to the charge through the tuyres 5. r 21 is a discharge chutewhich is secured to the shell 2 and extends into the space between thelower end of the shell 2 and the wall of the tray. The chute projectswith its pointed end 22 near the bottom of the tray and is cut away atthe side facing the shell 2 at 23 so as not to interfere with the slagwhich is discharged from the producer and forms a slope extending fromthe lower end of the shell to the wall of the ash tray.

24 is a water jacket surrounding the shell 2, and 25 is a pipe whichconnects the jacket to a supply of cooling water which circulates in thejacket, being heated therein.

In operation the tray 7 with the grate 1 is rotated by the wall 9 andthe worm wheel 8. The slag gradually descends as the grate is rotated.Larger blocks will normally form in the oxidation zone above the grate1, and will descend at the points of maximum cross sectional areaintermediate the shell and the receding portions 4 of the grate. Theblocks move on with the grate and finally encounter breaking members 15whereby they are crushed. Crushing is rendered more effective by theeccentric arrangement of the grate illustrated, but such arrangement isnot indispensible. Experience has shown, that the normal cutting membersarranged below the lower end of the shell do not operate satisfactorily.In contradistinction thereto the crushing action resulting from thecooperation of the polygonal grate which may be eccentric or not, withthe breaking members 15, is very efficient.

By cutting away the inner edge 23 of the chute 21 as shown, the slopingof the slag from the lower edge of the shell 2 is not interfered with,and lumps are not jammed between the slope and the edge of the chute.

I wish it to beunderstood that I do not desire to be limited to theexact details of construction shown and described for obviousmodifications will occur to a person skilled in the art.

In the claims affixed to this specification no selection of anyparticular modification of the invention is intended to. the exclusionof other modifications thereof and the right to subsequently make claimto any modification not covered by these claims is expressly reserved.

I claim:

1. A gas producer comprising a shell, a rotary grate having alternatelyprojecting and inwardly curved receding side portions in said shell, andbreaking members, also in said shell, arranged to cooperate with saidgrate, the face of each receding portion between each two projectingportions being graduated toward and meeting the outer portions of theprojecting portions, whereby to effect by the rotary movement of thegrate a gradual increase in crushing pressure on the ash and clinker anda working of the same outwardly toward the producer shell.

2. A gas producer comprising a shell, a rotary grate having alternatelyprojecting and inwardly curved receding side portions arrangedeccentrically in said shell and breaking members,

also in said shell, arranged to cooperate with said grate, the face ofeach receding portion between each two projecting portions beinggraduated toward and meeting the outer portions of the projectingportions, whereby to effect by the rotary movement of the grate agradual increase in crushing pressure on the ash and clinker and aworking of the same outwardly toward the producer shell.

3. A gas producer comprising a shell, a r0- tary grate havingalternately projecting and inwardly curved receding side portions insaid shell, and breaking members, also in said shell, arranged tocooperate with said grate, the size of said grate being so determinedthat the minimum distance between said projecting portions and saidshell is less than the distance between the lower end of said shell andthe bottom of said tray, the face of each receding portion between eachtwo projecting portions being graduated toward and meeting the outerportions of the projecting portions, whereby to effect by the rotarymovement of the grate a gradual increase in crushing pressure on the ashand clinker and a working of the same outwardly toward the producershell.

4. A gas producer comprising a shell, a rotary grate having alternatelyprojecting and inwardly curved receding side portions in said shell, andbreaking members, also in said shell, arranged to cooperate with saidgrate, the size of said grate being so determined that the minimumdistance between said receding portions and said shell is less than thedistance between the lower end of said shell and the bottom of saidtray, the face of each receding portion between each two projectingportions being graduated toward and meeting the outer portions of theprojecting portions, whereby to efiect by the rotary movement of thegrate a gradual increase in crushing pressure on the ash and clinker anda working of the same outwardly toward the producer shell.

5. A gas producer comprising a shell, a rotary grate having alternatelyprojecting and inwardly curved receding side portions in said shell,breaking members, also in said shell, arranged to cooperate With saidgrate, and a discharge chute in the space between said shell and saidtray, the upwardly extending edge of said chute, which faces said shellextending on the outer side of the shell from above the lower edgethereof down to and terminating substantially directly beneath saidlower edge and being formed so as to provide a mound accumulating spacebetween both the side and the bottom edge of the shell and said facingedge so as not to interfere with the sloping of the slag discharged fromsaid shell.

PAUL VAN ACKEREN.

